Installation - Wolf MGK-130 Technical Manual And Installation Instructions

Note:
Provide a drain & fill valve at the lowest system point.
Safety equipment
The minimum system pressure is 1.0 bar.
The gas condensing boilers are approved exclusively for
sealed unvented systems up to 6 bar. The maximum flow
temperature is factory-set to 85 °C and may be adjusted
to 90 °C if required. Generally, the flow temperature is
80 °C for DHW operation.
There is no need for a minimum throughput at maximum
flow temperatures below 85 °C.
Heating water
Domestic hot water may be used as fill water and top-
up water.
Thoroughly flush the system prior to filling with water.
The use of chemical additives and softening using single-
stage ion exchangers is not permissible.
The design information for water treatment
must be observed, otherwise system damage
due to water leaks may occur.
Wolf does not assume liability for any damage to the
heat exchanger caused by oxygen diffusion in the
heating water. In the event of oxygen penetrating the
system, we recommend a system separation through
the interconnection of a heat exchanger.
In the case of systems with large volumes of water and
those where large volumes of top-up water (e.g. through
water losses) are required, observe the relevant local
regulations regarding the prevention of damage in hot
water heating systems through scaling and corrosion.
Keep a system log (see technical information
regarding water treatment and commissioning
report).
Note:
Check with Wolf regarding suitable water treatment
measures.
14

Installation

Information on scaling
Scaling can be strongly influenced particularly through
the method of commissioning. Heat the system at the
lowest output with an even and adequate throughput. For
multi-boiler systems it is recommended to commission
all boilers simultaneously to prevent the overall amount
of lime concentrating on the heat exchanger surface of
an individual boiler.
Before commissioning, all hydraulic pipes
must undergo a tightness test:
Test pressure on heating water side max. 9
bar.
3062880_0910